GN(android): Fix up support for is_asan=true

build/config/sanitizers/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/sanitizers/sanitizers.gni")
 
 # Contains the dependencies needed for sanitizers to link into executables and
 # shared_libraries. Unconditionally depend upon this target as it is empty if
 # |is_asan|, |is_lsan|, |is_tsan|, |is_msan| and |use_custom_libcxx| are false.
 group("deps") {
@@ skipping 84 matching lines @@
         "-gline-tables-only",
       ]
     }
     if (is_asan) {
       asan_blacklist_path =
           rebase_path("//tools/memory/asan/blacklist.txt", root_build_dir)
       cflags += [
         "-fsanitize=address",
         "-fsanitize-blacklist=$asan_blacklist_path",
       ]
-      if (is_mac) {
-        cflags += [ "-mllvm -asan-globals=0" ]  # http://crbug.com/352073
+      if (is_android) {
+        # Android build relies on -Wl,--gc-sections removing unreachable code.
+        # ASan instrumentation for globals inhibits this and results in a
+        # library with unresolvable relocations.
+        # TODO(eugenis): find a way to reenable this.
+        cflags += [
+          "-mllvm",
+          "-asan-globals=0",
+        ]
+      } else if (is_mac) {
+        # http://crbug.com/352073
+        cflags += [
+          "-mllvm",
+          "-asan-globals=0",
+        ]
         # TODO(GYP): deal with mac_bundles.
       }
     }
     if (is_lsan) {
       cflags += [ "-fsanitize=leak" ]
     }
     if (is_tsan) {
       tsan_blacklist_path =
           rebase_path("//tools/memory/tsan_v2/ignores.txt", root_build_dir)
       cflags += [
@@ skipping 111 matching lines @@
 
 config("default_sanitizer_coverage_flags") {
   cflags = []
 
   if (use_sanitizer_coverage) {
     # FIXME: make this configurable.
     cflags +=
         [ "-fsanitize-coverage=edge,indirect-calls,8bit-counters,trace-cmp" ]
   }
 }